...have heard to use 3 liters.? I have heard people say to use 3 liters but the owners manual says 2.7 liters. The Rincon uses the motor oil for the engine and the automotive style transmission that it has so it can be tricky to measure oil level. To measure the oil level, the engine has to be warmed up for 5 minutes and then shut off for 5 minutes before taking a measurement on the dipstick.